Simple Application Updater - check for update and download
- check for new version form a text file form a URL
- compare with Appliation version form file named fileversion.ini in the app directory
- if it's good says - you have the final version
- else start downloading the new exe file from URL givin
- close the exe file if it's running
- back up the old exe file
- place the new exe file as application exe
- remove the old exe file